BDor--Pam said she used 3" squares, so when I drew it out I figured on using 3 x 5.5" rectangles (4), and 3" squares (4), with a 5.5" center square. But, I didn't know it it'd have the same effect. Hers is beautiful.
I don't know what the extra row would be. I bet it can't be too hard to figure out.